^Have you tried looking on pixiv? A lot of the times, for more complicated outfits, there will be a breakdown of the outfit if the producer/artist is on the website.

I haven't actually been able to get a pixiv account, so I can't ;-; Though I have seen a couple, like It's A Wonderful Cat's Life.
Also, I am sloooowly getting a group to cosplay Vocaloid together. Girlfirend says she's wanted to cosplay Teto so I'm trying to convince her and one of my friends at school has said he wants to be Len (and I would totally let him use my costume).
....squeeeeee.